Hello Reiner, thanks a lot for reporting this issue.
It seems that the update of python3-pyalsa from 1.0.29-1 to 1.1.6-2 triggers the crash. I've opened the bug#938965 to python3-pyalsa package with this issue [1], and I'll upload a workaround for solfege. Best Regards, François [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=938965
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